equatorial

UK: /ˌɛkwəˈtɔːri^əl/

US: /ˌikwəˈtɔriəl, ˌɛkwə-/

US: (ē′kwə tôr′ē əl, -tōr′-, ek′wə-)

WordReference Random House Learner's Dictionary of American English © 2025

e•qua•to•ri•al /ˌikwəˈtɔriəl, ˌɛkwə-/  adj. 

1. Place Names of or near the equator:
   equatorial regions.
2. typical of the region around the equator:
   equatorial heat.

WordReference Random House Unabridged Dictionary of American English © 2025

e•qua•to•ri•al  (ē′kwə tôr′ē əl, -tōr′-, ek′wə-), adj. 

1. Geography of, pertaining to, or near an equator, esp. the equator of the earth.
2. Geography of, like, or typical of the regions at the earth's equator:
   equatorial temperatures.

n. 

3. Optics a telescope mounting having two axes of motion, one parallel to the earth's axis and one at right angles to it.

• equator + -ial 1655–65

e′qua•to′ri•al•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

equatorial / ˌɛkwəˈtɔːrɪəl/ adjective

1. of, like, or existing at or near the equator
2. (of a telescope) mounted on the perpendicular axes, one of which is parallel to the earth's axis: an equatorial orbit
3. of or referring to the celestial equator

noun

1. an equatorial mounting for a telescope